<template>
  <view class="viewport">
    <!-- 推荐封面图 -->
    <view class="cover">
      <image :src="bannerPicture"></image>
    </view>
    <!-- 推荐选项 -->
    <view class="tabs">
      <text
        class="text"
        :class="{ active: index === activeIndex }"
        v-for="(item, index) in recommentList"
        :key="index"
        @click="activeIndex = index"
      >
        {{ item.subType.title }}
      </text>
    </view>
    <!-- 推荐列表 -->
    <scroll-view
      v-for="(item, index) in recommentList"
      :key="index"
      scroll-y
      v-show="index === activeIndex"
      class="scroll-view"
      @scrolltolower="getMore"
    >
      <view class="goods">
        <navigator
          hover-class="none"
          class="navigator"
          v-for="goods in item.goodsItem.items"
          :key="goods.id"
          :url="`/pages/goods/goods?id=${goods.id}`"
        >
          <image class="thumb" :src="goods.picture"></image>
          <view class="name ellipsis">{{ goods.name }}</view>
          <view class="price">
            <text class="symbol">¥</text>
            <text class="number">{{ goods.price }}</text>
          </view>
        </navigator>
      </view>
      <uni-load-more :status="item.finished ? 'noMore' : 'loading'" />
    </scroll-view>
  </view>
</template>
<script>
import { getRecommendDataApi } from "@/service/hot";
export default {
  data() {
    return {
      bannerPicture: "",
      recommentList: [],
      activeIndex: 0, // 记录当前展示的tab索引
    };
  },
  onLoad({ type }) {
    const urlMap = {
      1: { title: "特惠推荐", url: "/home/preference/mutli" },
      2: { title: "爆款推荐", url: "/home/inVogue/mutli" },
      3: { title: "一站买全", url: "/home/oneStop/mutli" },
      4: { title: "新鲜好物", url: "/home/new/mutli" },
    };
    // 保存到实例上
    this.currentInfo = urlMap[type];
    // 设置标题
    uni.setNavigationBarTitle({ title: this.currentInfo.title });
    this.getRecommendData();
  },
  methods: {
    async getRecommendData() {
      const { result } = await getRecommendDataApi(this.currentInfo.url);
      // 记录banner图片
      this.bannerPicture = result.bannerPicture;
      this.recommentList = result.subTypes.map((item) => ({
        subType: item,
        goodsItem: result.goodsItems[item.id],
      }));
      console.log(this.recommentList);
    },
    async getMore() {
      // 判断是否还有更多数据
      const currentShow = this.recommentList[this.activeIndex];
      // console.log(currentShow);
      // 获取到当前页和总页数
      const { page, pages } = currentShow.goodsItem;
      if (page >= pages) {
        // 没有更多数据了
        // 当前分类对象添加一个完成的标识
        // currentShow.finished = true;
        this.$set(currentShow, "finished", true);
        // 给用户一个提示
        uni.showToast({
          title: "没有更多数据了",
          icon: "none",
        });
        return;
      } else {
        currentShow.goodsItem.page++;
      }
      // 请求接口
      const params = {
        subType: currentShow.subType.id,
        page: currentShow.goodsItem.page,
        pageSize: 10,
      };
      const { result } = await getRecommendDataApi(
        this.currentInfo.url,
        params
      );
      // 分类的id
      const currentSubId = currentShow.subType.id;
      currentShow.goodsItem.items.push(
        ...result.goodsItems[currentSubId].items
      );
    },
  },
};
</script>

<style lang="scss">
page {
  height: 100%;
  background-color: #f4f4f4;
}
.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 180rpx 0 0;
  position: relative;
}
.cover {
  width: 750rpx;
  height: 225rpx;
  border-radius: 0 0 40rpx 40rpx;
  overflow: hidden;
  position: absolute;
  left: 0;
  top: 0;
  image {
    width: 100%;
    height: 100%;
  }
}
.scroll-view {
  flex: 1;
  overflow: hidden;
}
.tabs {
  display: flex;
  justify-content: space-evenly;
  height: 100rpx;
  line-height: 90rpx;
  margin: 0 20rpx;
  font-size: 28rpx;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  color: #333;
  background-color: #fff;
  position: relative;
  z-index: 9;
  .text {
    margin: 0 20rpx;
    position: relative;
  }
  .active {
    &::after {
      content: "";
      width: 40rpx;
      height: 4rpx;
      transform: translate(-50%);
      background-color: #27ba9b;
      position: absolute;
      left: 50%;
      bottom: 24rpx;
    }
  }
}
.goods {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 0 20rpx 20rpx;
  .navigator {
    width: 300rpx;
    padding: 20rpx;
    margin-top: 20rpx;
    border-radius: 10rpx;
    background-color: #fff;
  }
  .thumb {
    width: 300rpx;
    height: 305rpx;
  }
  .name {
    height: 88rpx;
    font-size: 26rpx;
  }
  .price {
    line-height: 1;
    color: #cf4444;
    font-size: 30rpx;
  }
  .symbol {
    font-size: 70%;
  }
  .decimal {
    font-size: 70%;
  }
}

.loading-text {
  text-align: center;
  font-size: 28rpx;
  color: #666;
  padding: 20rpx 0 50rpx;
}
</style>
